Mac App Box Sync Woes on M3 Mac: Got It Working (Mostly)
Alright, confession: I'm that guy who hoards project folders across clouds—crypto analytics scripts here, Unity assets there, Telegram bot configs everywhere. Box seemed like the sane choice for centralizing it all on my new M3 MacBook Pro running Sequoia 15.2. The app promises seamless desktop access to your cloud files without eating local storage, which is huge for my 512GB SSD. Downloaded Box Drive from their site, installed no problem, signed in with my work account... and then sync hell began. Files showing as "available offline" but refusing to open in Finder—error like "The file is locked or in use." Classic macOS quirk with cloud sync tools.
Tried the obvious first: quit and relaunch the app. Nada. Restarted Finder via killall Finder in Terminal—temporary fix, but files went read-only again after 10 minutes. Figured it was a permissions glitch, so dove into System Settings > Privacy & Security > Files and Folders. Box had access to Downloads and Desktop, but not Documents (where my main folders live). Granted it full disk access—boom, partial win. Most files opened, but nested subfolders in my crypto data repo? Still "access denied." Annoying, especially when editing a FastAPI backend script mid-sync. Spent an hour force-quitting, no joy.
Next, uninstalled via their official remover tool (smart move, Box—avoids leftovers). Re-downloaded from box.com, fresh install. Same issue. Blamed Sequoia—heard M3 ARM optimizations trip up some sync clients. Switched to Rosetta: right-click Box.app > Get Info > check "Open using Rosetta." Relaunched, and sync sped up, but the lock errors persisted on larger folders (over 5GB). Tried excluding them in Box settings—worked for access, but then offline mode broke entirely. Dead end. At this point, I'm eyeing Dropbox alternatives, but nah, Box's AI content tools are killer for my workflow.
What cracked it? Clean slate plus Gatekeeper tweak and selective sync. First, full nuke: used Activity Monitor to kill all Box processes, trashed the app and ~/Library/Application Support/Box folder (hidden cruft city). Reboot. Redownloaded, but before opening, hit the inevitable "developer cannot be verified" wall since it's not App Store native. Followed Apple's guide—System Settings > Privacy & Security, clicked "Open Anyway" after first launch attempt. Signed in, then in Box Drive settings (top menu bar icon > Preferences), turned off "Make all files available offline" and manually selected only my key folders: crypto bots, Unity projects, AI art gens. Granted Files and Folders access again, plus Full Disk for good measure.
Sync stabilized immediately. Files open/edit/save like locals, changes propagate in seconds. Tested with a 2GB Unity idle game export—flawless, even collaborated on a Numbers sheet via Box integration. CPU hovers at 5-10% during idle sync on M3, battery impact minimal. Bonus: their note-taking feature auto-saves to-dos for bot deploys. If you're scripting heavy like me, pin the Box menulet for quick folder access.
Pro tip if you're in the same boat from day one:
Nuke remnants before reinstall (rm -rf ~/Library/Application\ Support/Box).
Selective sync > full offline (saves space, fewer locks).
Rosetta if ARM glitches hit, but native works fine post-tweak.
Stumbled on this Mac App Box page while troubleshooting—solid overview of features and macOS reqs without fluff: https://workpointtoday.xyz/. Bookmarked it for version checks next time Box pushes an update.
One lingering irony? Box warns about "enterprise-grade security," yet macOS Gatekeeper treats it like sketchy shareware. Devs, notarize harder. No App Store version yet, which would sidestep this entirely (searched apps.apple.com—no dice). But now it's humming, freeing me to focus on that Telegram bot upgrade instead of folder fights. If your M-series Mac acts up similarly, this sequence should save you hours.